JP4145136B2 - Continuous processing method of steel wire - Google Patents

Continuous processing method of steel wire Download PDF

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Publication number
JP4145136B2
JP4145136B2 JP2002363694A JP2002363694A JP4145136B2 JP 4145136 B2 JP4145136 B2 JP 4145136B2 JP 2002363694 A JP2002363694 A JP 2002363694A JP 2002363694 A JP2002363694 A JP 2002363694A JP 4145136 B2 JP4145136 B2 JP 4145136B2
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Prior art keywords
steel wire
liter
electrolytic
zinc
anode
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JP2004197118A (en
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敬 二ノ宮
英男 石田
英一 岩崎
大作 宇野
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Nihon Parkerizing Co Ltd
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Nihon Parkerizing Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は、鋼線の連続処理方法に関するものである。
【0002】
【従来の技術】
硬鋼線やSUS鋼線を伸線処理する場合、一般に、脱スケール→焼鈍→化成処理→潤滑処理→伸線の順で処理が行われる。
鋼線を走行させつつ脱スケールする方法として、酸洗浴中を走行する鋼線表面に電流を流す電解酸洗方法が特許文献1に開示されている。
鋼線を走行させつつ焼鈍する方法として、走行する鋼線を通電加熱する通電加熱焼鈍方法が特許文献2に開示され、走行する鋼線を無酸化雰囲気下で加熱し、次いで外面が水冷され内部が無酸化雰囲気下にあるパイプに鋼線を挿通して鋼線を冷却する無酸化焼鈍方法が特許文献3に開示されている。
亜鉛イオン2〜60g/リットル、リン酸イオン2〜80g/リットル、硝酸イオン3〜100g/リットルを含有し、リン酸イオンに対する亜鉛イオンのモル比が0.9〜1.5の処理液中に鋼線を走行させつつ、鋼線を陰極として、1〜100A/dmの鋼線表面での電流密度、1〜30秒の電解時間で処理液を電解して、鋼線の表面にリン酸塩被膜を形成する方法が特許文献1に開示されている。
【0003】
【特許文献1】
特願2000−80497号公報
【特許文献2】
特公平5−81648号公報
【特許文献3】
特開昭62−4834号公報
【0004】
【発明が解決しようとする課題】
鋼線を走行させつつ、電解酸洗による脱スケール→無酸化雰囲気下での通電加熱焼鈍→化成処理→潤滑処理→伸線を連続処理できれば、従来のバッチ処理に比べて鋼線の処理効率が格段に向上する。しかし、鋼線を走行させつつ処理する従来技術は、電解酸洗による脱スケール→化成処理、又は通電加熱焼鈍単独であり、鋼線を走行させつつ、電解酸洗して脱スケールし、無酸化雰囲気下で通電加熱焼鈍する技術、或いは更に鋼線を走行させつつ化成処理し潤滑処理する技術、或いは更に鋼線を走行させつつ伸線する技術は、未だ提案されていない。その原因として、電解酸洗した鋼線を通電加熱焼鈍する際にスパークが発生して鋼線が損傷し易く、その防止が困難であったことが挙げられる。
本発明は、通電加熱焼鈍時のスパークの発生を防止することにより、鋼線を走行させつつ、電解酸洗して脱スケールし、無酸化雰囲気下で通電加熱焼鈍する技術、或いは更に鋼線を走行させつつ化成処理し潤滑処理する技術、或いは更に鋼線を走行させつつ伸線する技術を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記課題を解決するために、本発明においては、鋼線を走行させつつ、電解酸洗し、通電加熱焼鈍し、電解酸洗工程において、硫酸基濃度が10〜30重量%、第1鉄イオン濃度が1〜100g/リットル、浴温が5〜40℃の酸洗浴条件下で、酸洗浴入口部から出口部へ向けて陽極、陰極、陽極、陰極、陽極、陽極の順に電極を配設し鋼線に間接通電して、20〜200A/dmの鋼線表面での電流密度で、2.5〜20秒間に亘って鋼線を電解酸洗し、通電加熱焼鈍工程において、無酸化雰囲気下で鋼線を通電加熱し、外面が水冷され内部が無酸化雰囲気下にあるパイプに鋼線を挿通して鋼線を冷却することを特徴とする鋼線の連続処理方法を提供する。
【0006】
上記条件で鋼線を電解酸洗することにより、鋼線表面を完全に脱錆、脱スケールし且つ滑らかにすることができる。完全に脱錆、脱スケールされ且つ滑らかにされた表面を有する鋼線を走行させつつ通電加熱焼鈍すると、通電ロール間で走行する鋼線の挙動が安定化し、スパークは発生しない。従って、鋼線を走行させつつ、電解酸洗し、通電加熱焼鈍する鋼線の連続処理が可能となり、鋼線の処理効率が向上する。
無酸化雰囲気下で鋼線を通電加熱し、外面が水冷され内部が無酸化雰囲気下にあるパイプに鋼線を挿通して鋼線を冷却することにより、スケールを発生させることなく、鋼線を焼鈍することができる。
【0007】
本発明の好ましい態様においては、パイプ内を走行する鋼線を支持して、鋼線とパイプ内面との接触を防止する。
鋼線とパイプ内面との接触を防止することにより、鋼線表面に擦り傷が発生するのを防止することができる。
【0008】
本発明の好ましい態様においては、通電加熱焼鈍後、更に鋼線を走行させつつ電解化成し、潤滑処理する。
本発明の好ましい態様においては、潤滑処理後、更に鋼線を走行させつつ伸線する。
通電加熱焼鈍後、更に連続して化成処理と潤滑処理とを行い、或いは更に伸線処理を連続して行うことにより、鋼線の処理効率が向上する。
【0009】
本発明の好ましい態様においては、電解化成工程において、亜鉛イオン2〜70g/リットル、リン酸イオン2〜100g/リットル、硝酸イオン3〜100g/リットルを含有し、リン酸イオンに対する亜鉛イオンのモル比が0.5〜1.5の処理液を電解液とし、鋼線を陰極として、1〜100A/dmの鋼線表面での電流密度で、50〜200クーロンの電解を行い、鋼線の表面にリン酸塩被膜を形成する。
上記処理により、化成工程でのスラッジ発生を抑制し、且つ鋼線の伸線性を向上させることができる。
【0010】
本発明の好ましい態様においては、電解化成工程の前工程として、チタン濃度が1〜20mg/リットルのコロイダルチタン又は、亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の溶液であって、チタン又は亜鉛又はカルシウム又はマグネシウム又は鉄のイオン濃度が1〜100mg/リットルの処理液、又は亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の微粒子であって粒径が0.05〜5μの微粒子を含有する処理液に鋼線を接触させて鋼線を表面調整する。
上記処理により、緻密なリン酸塩被膜の形成が可能となる。
【0011】
本発明の好ましい態様においては、潤滑処理工程において、ステアリン酸ナトリウム、ステアリン酸カルシウム、ステアリン酸亜鉛、ステアリン酸鉄の何れか一つ又は二つ以上を主成分とする粉末、又は当該粉末の5〜20重量%水溶液、又は前記粉末の5〜20重量%水分散液を、鋼線に塗布する。
上記処理により、高速での伸線処理が可能となる。
【0012】
本発明の好ましい態様においては、鋼線の走行速度は10〜200m/分である。
本発明に係る処理方法によれば、10〜200m/分の速度で走行する鋼線を連続処理することが可能である。
【0013】
【発明の実施の形態】
本発明の実施例に係る鋼線の処理方法を以下に説明する。
図1に本発明に係る処理方法を実施するための鋼線処理装置を示す。
鋼線処理装置は、電解酸洗装置1と、水洗装置2と、送りロール3と、チョークトランス4と、通電加熱焼鈍装置5と、水冷装置6とを備えている。
送りロール3により従動ドラム100からから引き出された鋼線101が、二重矢印で示すように、電解酸洗装置1、水洗装置2中を順次走行し、次いでチョークトランス4、通電加熱焼鈍装置5、水冷装置6中を順次走行して、駆動ドラム102に巻き取られる。
送りロール3と駆動ドラム102間を走行する鋼線101に、適正な張力が与えられる。
【0014】
図2に示すように、電解酸洗装置1は、電解槽1aと、電解槽1a内に配設された6対の電極とを備えている。
各対の電極は、電解槽1a内を走行する鋼線101を挟んで且つ鋼線101から隙間を隔てて配設されている。前記6対の電極は、鋼線101の走行方向に関して後方から前方へ向けて陽極1b、陰極1c、陽極1d、陰極1e、陽極1f、陽極1gの順に配設されている。
電極1b、1cは直流電源1hに接続され、電極1d、1e、1fは直流電源1iに接続され、電極1gは直流電源1jに接続されている。直流電源1jの陰極は、電解槽1a外で電極ロール1kを介して鋼線101に接触している。
電極1b、1c、1d、1e、1f、1gの長さは、1m、1m、0.5m、0.5m、0.5m、0.5mに設定されている。
電解槽1a内の酸洗浴条件は、硫酸基濃度が10〜30重量%、第1鉄イオン濃度が1〜100g/リットル、浴温が5〜40℃に設定されている。
【0015】
水洗装置2は、鋼線101に沿って配設された3段の水洗ノズルを備えている。
送りロール3は、鋼線101に沿って配設されて鋼線101を挟持する複数対の駆動ロールを備えている。駆動ロールは図示しないモータにより駆動される。
チョークトランス4は、鋼線101から漏洩した電流を除去し、鋼線101外への電気的影響の波及を防止する。
【0016】
水洗装置2と送りロール3との間に、鋼線101を挟んで配設された複数のエアノズルからなる図示しないエアナイフが配設されている。
【0017】
通電加熱焼鈍装置5は、図1に示すように、鋼線101の走行方向に関して後方から前方へ順次配設された一対の電極ロール5aと、電極ロール5aと、電極ロール5aに対峙して配設された一対の受けロール5aとを有する通電加熱装置5aを備えている。
一対の電極ロール5aは鋼線101を挟持している。電極ロール5aと一対の受けロール5aとは、鋼線101に当接している。一対の電極ロール5aと電極ロール5aとは交流電源5aに接続されている。電極ロール5aと一対の受けロール5aとは加熱チャンバー5a内に収容されている。
通電加熱焼鈍装置5は、加熱チャンバー5aから鋼線101の走行方向に関して前方へ延びる冷却装置5bを備えている。冷却装置5bは内側パイプ5b内と外側パイプ5bとから成る二重パイプを有している。内側パイプ5b内を鋼線101が走行する。
内側パイプ5b内に、図示しないガス供給源から水素ガスと窒素ガスの混合ガスである無酸化雰囲気ガスが供給される。無酸化雰囲気ガスは、内側パイプ5b内と加熱チャンバー5a内とに充満し、内側パイプ5bの前端と加熱チャンバー5aの鋼線入口とから漏出する。
内側パイプ5bと外側パイプ5bとの間に形成された環状隙間の閉鎖された前端の近傍部に図示しない給水源から冷却水が供給される。冷却水は、前記環状隙間に充満し、前記環状隙間の閉鎖された後端の近傍部から排出される。
内側パイプ5b内に、複数のガイドローラー5bが配設されている。ガイドローラー5bは鋼線101を支持している。
【0018】
冷却装置6は、冷却水が貯留された冷却槽を備えている。
冷却装置6と駆動ドラム102との間に、鋼線101を挟んで配設された複数のエアノズルからなる図示しないエアナイフが配設されている。
【0019】
上記鋼線処理装置による鋼線101の処理を以下に説明する。
送りロール3により従動ドラム100から引き出された鋼線101は、電解酸洗装置1、水洗装置2、チョークトランス4、通電加熱焼鈍装置5、水冷装置6を通って分速40mで走行し、駆動ドラム102に巻き取られる。
送りロール3と駆動ドラム102間で適正な張力を印加された鋼線101は、真直に伸びた状態で通電加熱焼鈍装置5を通過する。
【0020】
鋼線101が6秒掛かって電極1b〜1gを通過する際に、鋼線101の表面は、経時的に、間接通電により陰極、陽極、陰極、陽極、陰極、陰極となる。硫酸基濃度が10〜30重量%、第1鉄イオン濃度が1〜100g/リットル、浴温が5〜40℃の酸洗浴条件下で、20〜200A/dmの鋼線表面の電流密度で、鋼線101は電解酸洗される。
陽極である鋼線101の表面から鉄が溶出することにより鉄錆が除去され、鋼線101の表面で発生した酸素ガスにより鋼線101表面のスケールや潤滑剤等が物理的に除去される。
陰極である鋼線101の表面で発生した水素ガスにより鋼線101表面のスケールや潤滑剤等が物理的に除去されると共に、陽極時に鋼線101の表面に析出した炭素が、陰極である鋼線101の表面で発生した水素ガスにより物理的に除去される。また、析出した鉄により陰極である鋼線101の表面が被覆される。
鋼線101表面が間接通電により経時的に陰極、陽極、陰極、陽極となって、表面の鉄錆、スケール、潤滑剤、析出した炭素等が物理的に除去されると共に、最後に2回連続して鋼線101表面が陰極となり、析出した鉄によって鋼線101表面が被覆されることにより、鋼線101表面が完全に脱錆、脱スケールされ且つ滑らかにされる。
【0021】
電解酸洗装置1を通過した鋼線101は、水洗装置2を通って水洗され、図示しないエアナイフを通り水切りされて乾燥し、送りロール3を通り適正な張力を印加されて真直に伸ばされる。
【0022】
真直に伸びた鋼線101は、通電加熱焼鈍装置5の通電加熱装置5aを通過する際に通電加熱され、冷却装置5bを通過する際に急冷されて、焼鈍される。
チョークトランス4により、鋼線101から漏洩した電流が除去され、鋼線101外への電気的影響の波及が防止される。
電解酸洗装置1により、鋼線101表面が完全に脱錆、脱スケールされ且つ滑らかにされており、且つ送りロール3と駆動ドラム102とにより鋼線101に適正な張力が印加されて鋼線101が真直に伸びているので、通電加熱装置5aを通過する際に、鋼線101の挙動は不安定にならない。また図示しないエアナイフにより鋼線101表面は完全に水切りされて乾燥している。この結果、鋼線101が通電加熱装置5aを通過する際にスパークの発生が防止され、スパークによる鋼線101の損傷発生が防止される。
通電加熱装置5aと冷却装置5bは無酸化雰囲気下にあるので、焼鈍時に鋼線101表面にスケールが発生するおそれは無い。ガイドローラー5bによって、鋼線101が支持されることにより、鋼線101と内側パイプ5b内面との接触が防止され、鋼線101表面での擦り傷の発生が防止される。
【0023】
通電加熱焼鈍装置5を通過した鋼線101は、冷却装置6を通過して室温まで冷却され、図示しないエアナイフを通って乾燥された後、駆動ドラム102に巻き取られる。
【0024】
電極1b〜1gの長さを調整し或いは電極1b〜1fを複数セット直列に配設し、更に直流電源1h、1i、1jの出力を調整することにより、10〜200m/分の走行速度範囲で、2.5〜20秒間に亘って、20〜200A/dmaの鋼線表面での電流密度で、鋼線101の表面を電解酸洗し、完全に脱錆、脱スケールし且つ滑らかにすることができる。
【0025】
図1の鋼線処理装置を用い、電解酸洗装置1での電解条件を、電解浴の硫酸濃度=28重量%、電解浴温度=30℃、鋼線表面での電流密度=200A/mに設定し、通電加熱焼鈍装置5での雰囲気ガス供給条件を、水素ガス30リットル/分、窒素ガス30リットル/分に設定し、鋼線の走行速度を21m/分に設定して、複数の供試鋼線を連続して電解酸洗し、通電加熱焼鈍した。電解酸洗後の鋼線表面と通電加熱焼鈍後の鋼線表面とを目視観察した。比較例として、複数の供試鋼線を従来技術のバッチ処理で酸洗し、従来技術の焼鈍方法で焼鈍し、酸洗後の鋼線表面と焼鈍後の鋼線表面とを目視観察した。
図3に、供試鋼線の材質、線径、抗張力、鋼線処理装置における通電加熱焼装置5aでの電流値、鋼線表面の目視観察結果を示す。図中目視観察結果欄の◎印は鋼線表面が完全に清浄で且つ滑らかであることを示し、○印は鋼線表面が略清浄で且つ滑らかであることを示し、△は鋼線表面の一部に汚れや傷や荒れがあることを示す。
図3から、図1の鋼線処理装置を用いることにより、通電加熱焼鈍時のスパーク発生を防止しつつ、走行する鋼線を、連続して電解酸洗し、通電加熱焼鈍できることが分かる。
【0026】
鋼線101の走行速度に応じて、電極1a〜1gの長さを適宜変更し、或いは、鋼線101の走行方向に関して陽極1fの後方に陽極と陰極の組み合わせを一対又は複数対追加し、或いは電解酸洗装置1を直列に複数配設しても良い。
【0027】
冷却装置6と駆動ドラム102との間に、表面調整装置と電解化成装置と潤滑装置とを配設し、或いは更に潤滑装置と駆動ドラム102との間に伸線装置を配設しても良い。電解酸洗から潤滑処理までの一貫した鋼線の連続処理が可能となり、或いは電解酸洗から伸線までの一貫した鋼線の連続処理が可能となる。この結果、鋼線の処理効率が従来のバッチ処理に比べて格段に向上する。
【0028】
表面調整処理工程においては、チタン濃度が1〜20mg/リットルのコロイダルチタン又は、亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の溶液であって、チタン又は亜鉛又はカルシウム又はマグネシウム又は鉄のイオン濃度が1〜100mg/リットルの処理液、又は亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の微粒子であって粒径が0.05〜5μの微粒子を含有する処理液に走行する鋼線101を接触させて、鋼線101を表面調整するのが望ましい。上記処理により、緻密なリン酸塩被膜の形成が可能となる。
化成処理工程においては、亜鉛イオン2〜70g/リットル、リン酸イオン2〜100g/リットル、硝酸イオン3〜100g/リットルを含有し、リン酸イオンに対する亜鉛イオンのモル比が0.5〜1.5の処理液を電解液とし、鋼線101を陰極として、1〜100A/dmの鋼線表面での電流密度で、50〜200クーロンの電解を行い、鋼線101の表面にリン酸塩被膜を形成するのが望ましい。上記処理により、化成工程でのスラッジ発生を抑制し、且つ鋼線の伸線性を向上させることができる。
【0029】
潤滑処理工程においては、ステアリン酸ナトリウム、ステアリン酸カルシウム、ステアリン酸亜鉛、ステアリン酸鉄の何れか一つ又は二つ以上を主成分とする粉末、又は当該粉末の5〜20重量%水溶液、又は前記粉末の5〜20重量%水分散液を、走行する鋼線101に塗布するのが望ましい。上記処理により、高速での伸線処理が可能となる。
【0030】
【発明の効果】
上記説明から明らかなように、本発明に係る鋼線の連続処理方法では、電解酸洗工程において、硫酸基濃度が10〜30重量%、第1鉄イオン濃度が1〜100g/リットル、浴温が5〜40℃の酸洗浴条件下で、酸洗浴入口部から出口部へ向けて陽極、陰極、陽極、陰極、陽極、陽極の順に電極を配設して鋼線に間接通電して、20〜200A/dmの鋼線表面での電流密度で、2.5〜20秒間に亘って鋼線を電解酸洗するので、鋼線表面を完全に脱錆、脱スケールし且つ滑らかにすることができる。
完全に脱錆、脱スケールされ且つ滑らかにされた表面を有する鋼線を走行させつつ通電加熱焼鈍すると、通電ロール間で走行する鋼線の挙動が安定化し、スパークは発生しない。
従って、鋼線を走行させつつ、電解酸洗し、通電加熱焼鈍する鋼線の連続処理が可能となる。
【図面の簡単な説明】
【図1】本発明に係る鋼線の連続処理方法を実施するための鋼線の処理装置の構成図である。
【図2】図1の処理装置が備える電解酸洗装置の構成図である。
【図3】図1の処理装置を用いて行って鋼線の処理実験の実験条件の一部と実験結果とを示す表である。
【符号の説明】
1 電解酸洗装置
1b、1c、1d、1e、1f、1g 電極
2 水洗装置
3 送りロール
4 チョークトランス
5 通電加熱焼鈍装置
6 冷却装置
100 従動ドラム
101 鋼線
102 駆動ドラム
[0001]
[Industrial application fields]
The present invention relates to a method for continuously treating steel wire.
[0002]
[Prior art]
When a hard steel wire or a SUS steel wire is drawn, the treatment is generally performed in the order of descaling → annealing → chemical conversion treatment → lubricating treatment → drawing.
As a method of descaling while running a steel wire, Patent Literature 1 discloses an electrolytic pickling method in which an electric current is passed through the surface of a steel wire running in a pickling bath.
As a method of annealing while running a steel wire, an electric heating annealing method in which a running steel wire is energized and heated is disclosed in Patent Document 2, and the running steel wire is heated in a non-oxidizing atmosphere, and then the outer surface is water-cooled to the inside. Patent Document 3 discloses a non-oxidizing annealing method in which a steel wire is inserted into a pipe in a non-oxidizing atmosphere to cool the steel wire.
In a treatment solution containing 2 to 60 g / liter of zinc ions, 2 to 80 g / liter of phosphate ions, 3 to 100 g / liter of nitrate ions, and having a molar ratio of zinc ions to phosphate ions of 0.9 to 1.5. While running the steel wire, using the steel wire as a cathode, the treatment liquid was electrolyzed at a current density of 1 to 100 A / dm 2 on the steel wire surface and an electrolysis time of 1 to 30 seconds, and phosphoric acid was applied to the surface of the steel wire. A method of forming a salt film is disclosed in Patent Document 1.
[0003]
[Patent Document 1]
Japanese Patent Application No. 2000-80497 [Patent Document 2]
Japanese Patent Publication No. 5-81648 [Patent Document 3]
Japanese Patent Application Laid-Open No. 62-4834
[Problems to be solved by the invention]
If the steel wire is running and descaling by electrolytic pickling → electrification heating annealing in non-oxidizing atmosphere → chemical conversion treatment → lubrication treatment → wire drawing can be processed continuously, compared to conventional batch processing, the processing efficiency of steel wire can be improved. Greatly improved. However, the conventional technology for processing while running the steel wire is descaling by electrolytic pickling → chemical conversion treatment or electric heating annealing alone. There has not yet been proposed a technique for conducting heating and annealing in an atmosphere, a technique for chemical conversion treatment and lubrication while running a steel wire, or a technique for further drawing a steel wire while running. As the cause, it is mentioned that when the steel wire subjected to electrolytic pickling is subjected to electric heating annealing, sparks are generated and the steel wire is easily damaged, and the prevention thereof is difficult.
The present invention prevents the occurrence of sparks during electric heating annealing, and while running the steel wire, it is subjected to electrolytic pickling, descaling, and electric heating annealing in a non-oxidizing atmosphere, or further steel wire It is an object of the present invention to provide a technology for chemical conversion treatment and lubrication treatment while running, or a technology for drawing a wire while running a steel wire.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, while running a steel wire, it is subjected to electrolytic pickling, electrical heating annealing, and in the electrolytic pickling step, the sulfate group concentration is 10 to 30% by weight, ferrous ions The electrodes are arranged in the order of anode, cathode, anode, cathode, anode, anode from the pickling bath inlet to the outlet under conditions of pickling bath with a concentration of 1 to 100 g / liter and a bath temperature of 5 to 40 ° C. Indirect energization of the steel wire, electrolytic pickling of the steel wire over a period of 2.5 to 20 seconds at a current density on the surface of the steel wire of 20 to 200 A / dm 2 , and a non-oxidizing atmosphere in the electric heating annealing process There is provided a continuous processing method of a steel wire, wherein the steel wire is energized and heated, the steel wire is inserted into a pipe whose outer surface is water-cooled and the inside is in a non-oxidizing atmosphere to cool the steel wire.
[0006]
By subjecting the steel wire to electrolytic pickling under the above conditions, the surface of the steel wire can be completely derusted, descaled and smoothed. When electric heating and annealing is performed while running a steel wire having a completely derusted, descaled and smoothed surface, the behavior of the steel wire running between energized rolls is stabilized, and no spark is generated. Therefore, it is possible to continuously process the steel wire that is electrolytically pickled and subjected to electric heating annealing while running the steel wire, and the processing efficiency of the steel wire is improved.
The steel wire is cooled without causing scale by energizing and heating the steel wire in a non-oxidizing atmosphere, inserting the steel wire into a pipe whose outer surface is water-cooled and the inside is in a non-oxidizing atmosphere, and cooling the steel wire. Can be annealed.
[0007]
In the preferable aspect of this invention, the steel wire which drive | works the inside of a pipe is supported, and the contact with a steel wire and a pipe inner surface is prevented.
By preventing contact between the steel wire and the inner surface of the pipe, it is possible to prevent the surface of the steel wire from being scratched.
[0008]
In a preferred embodiment of the present invention, after the electric heating annealing, the steel wire is further electrolyzed and lubricated while being run.
In a preferred embodiment of the present invention, after the lubrication treatment, the steel wire is further drawn while running.
After the electric heating annealing, the chemical conversion treatment and the lubrication treatment are further continuously performed, or the wire drawing treatment is further continuously performed, whereby the steel wire processing efficiency is improved.
[0009]
In a preferred embodiment of the present invention, the electrolytic formation step contains zinc ions 2 to 70 g / liter, phosphate ions 2 to 100 g / liter, nitrate ions 3 to 100 g / liter, and a molar ratio of zinc ions to phosphate ions. Of 0.5 to 1.5 as an electrolytic solution, steel wire as a cathode, and electrolysis of 50 to 200 coulombs at a current density on the surface of the steel wire of 1 to 100 A / dm 2 . A phosphate coating is formed on the surface.
By the said process, sludge generation | occurrence | production in a chemical conversion process can be suppressed and the drawability of a steel wire can be improved.
[0010]
In a preferred embodiment of the present invention, as a pre-step of the electrolytic formation step, colloidal titanium having a titanium concentration of 1 to 20 mg / liter, or a solution of a metal phosphate containing any one of zinc, calcium, magnesium, and iron A treatment liquid having an ion concentration of 1 to 100 mg / liter of titanium , zinc, calcium, magnesium or iron, or fine particles of a metal phosphate containing any one of zinc, calcium, magnesium and iron. Then, the steel wire is brought into contact with a treatment liquid containing fine particles having a particle size of 0.05 to 5 μm to adjust the surface of the steel wire.
By the above treatment, a dense phosphate coating can be formed.
[0011]
In a preferred embodiment of the present invention, in the lubricating treatment step, a powder mainly containing any one or more of sodium stearate, calcium stearate, zinc stearate, and iron stearate, or 5 to 20 of the powder. A 5% by weight aqueous solution or a 5-20% by weight aqueous dispersion of the powder is applied to the steel wire.
With the above processing, high-speed wire drawing processing is possible.
[0012]
In the preferable aspect of this invention, the running speed of a steel wire is 10-200 m / min.
According to the treatment method of the present invention, it is possible to continuously treat a steel wire traveling at a speed of 10 to 200 m / min.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The steel wire processing method according to the embodiment of the present invention will be described below.
FIG. 1 shows a steel wire processing apparatus for carrying out the processing method according to the present invention.
The steel wire processing apparatus includes an electrolytic pickling apparatus 1, a water washing apparatus 2, a feed roll 3, a choke transformer 4, an electric heating annealing apparatus 5, and a water cooling apparatus 6.
A steel wire 101 drawn from the driven drum 100 by the feed roll 3 sequentially travels through the electrolytic pickling apparatus 1 and the water washing apparatus 2 as shown by a double arrow, and then the choke transformer 4 and the electric heating annealing apparatus 5. The water cooling device 6 sequentially travels and is wound around the drive drum 102.
Appropriate tension is applied to the steel wire 101 running between the feed roll 3 and the drive drum 102.
[0014]
As shown in FIG. 2, the electrolytic pickling apparatus 1 includes an electrolytic bath 1a and six pairs of electrodes disposed in the electrolytic bath 1a.
Each pair of electrodes is disposed with a gap between the steel wire 101 and a steel wire 101 that travels in the electrolytic cell 1a. The six pairs of electrodes are arranged in the order of the anode 1b, the cathode 1c, the anode 1d, the cathode 1e, the anode 1f, and the anode 1g from the rear to the front in the traveling direction of the steel wire 101.
The electrodes 1b and 1c are connected to a DC power source 1h, the electrodes 1d, 1e and 1f are connected to a DC power source 1i, and the electrode 1g is connected to a DC power source 1j. The cathode of the DC power source 1j is in contact with the steel wire 101 via the electrode roll 1k outside the electrolytic cell 1a.
The lengths of the electrodes 1b, 1c, 1d, 1e, 1f, and 1g are set to 1 m, 1 m, 0.5 m, 0.5 m, 0.5 m, and 0.5 m.
The pickling bath conditions in the electrolytic cell 1a are set such that the sulfate group concentration is 10 to 30% by weight, the ferrous ion concentration is 1 to 100 g / liter, and the bath temperature is 5 to 40 ° C.
[0015]
The water washing apparatus 2 includes a three-stage water washing nozzle disposed along the steel wire 101.
The feed roll 3 includes a plurality of pairs of drive rolls that are disposed along the steel wire 101 and sandwich the steel wire 101. The drive roll is driven by a motor (not shown).
The choke transformer 4 removes the current leaked from the steel wire 101 and prevents the electrical influence from spreading outside the steel wire 101.
[0016]
Between the water washing apparatus 2 and the feed roll 3, an air knife (not shown) including a plurality of air nozzles disposed with the steel wire 101 interposed therebetween is disposed.
[0017]
As shown in FIG. 1, the electric heating annealing apparatus 5 is opposed to a pair of electrode rolls 5 a 1 , an electrode roll 5 a 2, and an electrode roll 5 a 2 that are sequentially arranged from the rear to the front in the traveling direction of the steel wire 101. and a resistance heating apparatus 5a and a pair of receiving rolls 5a 3 disposed in.
The pair of electrode rolls 5a 1 sandwich the steel wire 101. The electrode roll 5 a 2 and the pair of receiving rolls 5 a 3 are in contact with the steel wire 101. The pair of electrode rolls 5a 1 and the electrode roll 5a 2 are connected to an AC power source 5a 4. The electrode roll 5a 2 and the pair of receiving rolls 5a 3 are accommodated in the heating chamber 5a 5 .
Electrical heating annealing apparatus 5 is provided with a cooling device 5b extending forwardly with respect to the running direction of the steel wire 101 from the heating chamber 5a 5. Cooling device 5b has a double pipe consisting of an inner pipe 5b 1 and the outer pipe 5b 2 Prefecture. The inner pipe 5b within a steel wire 101 travels.
A non-oxidizing atmosphere gas which is a mixed gas of hydrogen gas and nitrogen gas is supplied into the inner pipe 5b 1 from a gas supply source (not shown). Non-oxidizing atmospheric gas, fills the inner pipe 5b within a heating chamber 5a 5, leaking from the front end of the inner pipe 5b 1 and steel wire inlet of the heating chamber 5a 5.
Cooling water from a water supply source (not shown) in the vicinity of the closed front end of the formed annular gap between the inner pipe 5b 1 and the outer pipe 5b 2 are supplied. The cooling water fills the annular gap and is discharged from the vicinity of the rear end where the annular gap is closed.
A plurality of guide rollers 5b 3 are disposed in the inner pipe 5b 1 . The guide roller 5b 3 supports the steel wire 101.
[0018]
The cooling device 6 includes a cooling tank in which cooling water is stored.
Between the cooling device 6 and the drive drum 102, an air knife (not shown) composed of a plurality of air nozzles disposed with the steel wire 101 interposed therebetween is disposed.
[0019]
The process of the steel wire 101 by the said steel wire processing apparatus is demonstrated below.
The steel wire 101 drawn from the driven drum 100 by the feed roll 3 travels at a speed of 40 m / min through the electrolytic pickling device 1, the water washing device 2, the choke transformer 4, the electric heating annealing device 5, and the water cooling device 6 and is driven. The drum 102 is wound up.
The steel wire 101 to which an appropriate tension is applied between the feed roll 3 and the drive drum 102 passes through the electric heating annealing apparatus 5 in a state of being straightened.
[0020]
When the steel wire 101 takes 6 seconds and passes through the electrodes 1b to 1g, the surface of the steel wire 101 becomes a cathode, an anode, a cathode, an anode, a cathode, and a cathode by indirect energization with time. With a current density on the surface of the steel wire of 20 to 200 A / dm 2 under a pickling bath condition in which the sulfate group concentration is 10 to 30% by weight, the ferrous ion concentration is 1 to 100 g / liter, and the bath temperature is 5 to 40 ° C. The steel wire 101 is electrolytically pickled.
Iron is eluted from the surface of the steel wire 101 serving as the anode to remove iron rust, and the oxygen gas generated on the surface of the steel wire 101 physically removes the scale, lubricant, and the like on the surface of the steel wire 101.
The scale, lubricant, and the like on the surface of the steel wire 101 are physically removed by the hydrogen gas generated on the surface of the steel wire 101 as the cathode, and the carbon deposited on the surface of the steel wire 101 during the anode is the steel as the cathode. It is physically removed by the hydrogen gas generated on the surface of the wire 101. Moreover, the surface of the steel wire 101 which is a cathode is coat | covered with precipitated iron.
The surface of the steel wire 101 becomes a cathode, anode, cathode, anode over time by indirect energization, and iron rust, scale, lubricant, precipitated carbon, etc. on the surface are physically removed, and finally, continuous twice. Then, the surface of the steel wire 101 becomes a cathode, and the surface of the steel wire 101 is covered with the precipitated iron, so that the surface of the steel wire 101 is completely derusted, descaled and smoothed.
[0021]
The steel wire 101 that has passed through the electrolytic pickling device 1 is washed with water through the water washing device 2, drained through an air knife (not shown), dried, passed through the feed roll 3, applied with appropriate tension, and straightened.
[0022]
The straight steel wire 101 is energized and heated when passing through the energization heating device 5a of the energization heating annealing device 5, and is rapidly cooled and annealed when passing through the cooling device 5b.
The choke transformer 4 removes the current leaked from the steel wire 101 and prevents the electrical influence from spreading outside the steel wire 101.
The surface of the steel wire 101 is completely derusted, descaled and smoothed by the electrolytic pickling apparatus 1, and an appropriate tension is applied to the steel wire 101 by the feed roll 3 and the drive drum 102. Since 101 extends straight, the behavior of the steel wire 101 does not become unstable when passing through the electric heating device 5a. The surface of the steel wire 101 is completely drained and dried by an air knife (not shown). As a result, when the steel wire 101 passes through the energization heating device 5a, generation of spark is prevented, and damage to the steel wire 101 due to spark is prevented.
Since the electric heating device 5a and the cooling device 5b are in a non-oxidizing atmosphere, there is no possibility that scales are generated on the surface of the steel wire 101 during annealing. Since the steel wire 101 is supported by the guide roller 5b 3 , the contact between the steel wire 101 and the inner surface of the inner pipe 5b 1 is prevented, and the generation of scratches on the surface of the steel wire 101 is prevented.
[0023]
The steel wire 101 that has passed through the electric heating annealing device 5 passes through the cooling device 6, is cooled to room temperature, is dried through an air knife (not shown), and is wound around the drive drum 102.
[0024]
By adjusting the length of the electrodes 1b to 1g or arranging a plurality of sets of electrodes 1b to 1f in series, and further adjusting the output of the DC power sources 1h, 1i and 1j, the traveling speed range is 10 to 200 m / min. The surface of the steel wire 101 is electrolytically pickled at a current density on the surface of the steel wire of 20 to 200 A / dm 2 a for 2.5 to 20 seconds, completely derusted, descaled and smoothly can do.
[0025]
The electrolytic condition in the electrolytic pickling apparatus 1 is as follows. The sulfuric acid concentration of the electrolytic bath = 28 wt%, the electrolytic bath temperature = 30 ° C., and the current density on the steel wire surface = 200 A / m 2. The atmospheric gas supply conditions in the electric heating annealing apparatus 5 are set to hydrogen gas 30 liters / minute, nitrogen gas 30 liters / minute, the steel wire traveling speed is set to 21 m / minute, and a plurality of The test steel wire was subjected to electrolytic pickling continuously and subjected to electric heating annealing. The steel wire surface after electrolytic pickling and the steel wire surface after electric heating annealing were visually observed. As a comparative example, a plurality of test steel wires were pickled by conventional batch processing, annealed by a conventional annealing method, and the steel wire surface after pickling and the steel wire surface after annealing were visually observed.
In FIG. 3, the material value of a test steel wire, a wire diameter, a tensile strength, the electric current value in the electric heating baking apparatus 5a in a steel wire processing apparatus, and the visual observation result of the steel wire surface are shown. In the figure, ◎ in the visual observation result column indicates that the surface of the steel wire is completely clean and smooth, ○ indicates that the surface of the steel wire is substantially clean and smooth, and △ indicates the surface of the steel wire. Indicates that some parts are dirty, scratched or rough.
From FIG. 3, it can be seen that by using the steel wire processing apparatus of FIG. 1, the traveling steel wire can be continuously electrolytically pickled and subjected to the electric heating annealing while preventing the occurrence of sparks during the electric heating annealing.
[0026]
Depending on the traveling speed of the steel wire 101, the lengths of the electrodes 1a to 1g are changed as appropriate, or a pair or a plurality of combinations of anodes and cathodes are added behind the anode 1f in the traveling direction of the steel wire 101, A plurality of electrolytic pickling apparatuses 1 may be arranged in series.
[0027]
Between the cooling device 6 and the driving drum 102, a surface conditioner, an electrolysis apparatus, and a lubricating device may be provided, or a wire drawing device may be provided between the lubricating device and the driving drum 102. . Consistent continuous processing of steel wires from electrolytic pickling to lubrication is possible, or consistent continuous processing of steel wires from electrolytic pickling to wire drawing is possible. As a result, the processing efficiency of the steel wire is significantly improved as compared with the conventional batch processing.
[0028]
In the surface conditioning treatment process, colloidal titanium having a titanium concentration of 1 to 20 mg / liter, or a solution of a metal phosphate containing any one of zinc, calcium, magnesium, and iron, which is titanium, zinc, or calcium Or a treatment liquid having an ion concentration of magnesium or iron of 1 to 100 mg / liter, or fine particles of metal phosphate containing any one of zinc, calcium, magnesium and iron, and having a particle size of 0.05 to 5 μm It is desirable to adjust the surface of the steel wire 101 by bringing the steel wire 101 traveling into contact with the treatment liquid containing the fine particles. By the above treatment, a dense phosphate coating can be formed.
In the chemical conversion treatment step, zinc ions 2 to 70 g / liter, phosphate ions 2 to 100 g / liter, nitrate ions 3 to 100 g / liter are contained, and the molar ratio of zinc ions to phosphate ions is 0.5 to 1. Electrolysis of 50 to 200 coulombs at a current density on the surface of the steel wire of 1 to 100 A / dm 2 with the treatment solution 5 as the electrolyte, the steel wire 101 as the cathode, and phosphate on the surface of the steel wire 101 It is desirable to form a coating. By the said process, sludge generation | occurrence | production in a chemical conversion process can be suppressed and the drawability of a steel wire can be improved.
[0029]
In the lubricating treatment step, a powder mainly containing any one or more of sodium stearate, calcium stearate, zinc stearate and iron stearate, or a 5 to 20% by weight aqueous solution of the powder, or the powder It is desirable to apply a 5 to 20 wt% aqueous dispersion of the steel wire 101 to the traveling. With the above processing, high-speed wire drawing processing is possible.
[0030]
【The invention's effect】
As is clear from the above description, in the continuous treatment method for steel wire according to the present invention, in the electrolytic pickling process, the sulfate group concentration is 10 to 30% by weight, the ferrous ion concentration is 1 to 100 g / liter, the bath temperature. Is placed in the order of anode, cathode, anode, cathode, anode, anode from the pickling bath inlet to the outlet under the pickling bath conditions of 5 to 40 ° C., and indirectly energizing the steel wire, 20 Since the steel wire is subjected to electrolytic pickling for 2.5 to 20 seconds at a current density on the surface of the steel wire of ˜200 A / dm 2 , the steel wire surface should be completely derusted, descaled and smoothed. Can do.
When electric heating and annealing is performed while running a steel wire having a completely derusted, descaled and smoothed surface, the behavior of the steel wire running between energized rolls is stabilized, and no spark is generated.
Accordingly, it is possible to continuously process the steel wire that is subjected to electrolytic pickling and current heating annealing while the steel wire is running.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a steel wire processing apparatus for carrying out a steel wire continuous processing method according to the present invention.
FIG. 2 is a configuration diagram of an electrolytic pickling apparatus provided in the processing apparatus of FIG. 1;
FIG. 3 is a table showing some experimental conditions and experimental results of steel wire processing experiments performed using the processing apparatus of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electrolytic pickling apparatus 1b, 1c, 1d, 1e, 1f, 1g Electrode 2 Water washing apparatus 3 Feed roll 4 Choke transformer 5 Electric heating annealing apparatus 6 Cooling apparatus 100 Followed drum 101 Steel wire 102 Drive drum

Claims (8)

鋼線を走行させつつ、電解酸洗し、通電加熱焼鈍し、電解酸洗工程において、硫酸基濃度が10〜30重量%、第1鉄イオン濃度が1〜100g/リットル、浴温が5〜40℃の酸洗浴条件下で、酸洗浴入口部から出口部へ向けて陽極、陰極、陽極、陰極、陽極、陽極の順に電極を配設し鋼線に間接通電して、20〜200A/dmの鋼線表面での電流密度で、2.5〜20秒間に亘って鋼線を電解酸洗し、通電加熱焼鈍工程において、無酸化雰囲気下で鋼線を通電加熱し、外面が水冷され内部が無酸化雰囲気下にあるパイプに鋼線を挿通して鋼線を冷却することを特徴とする鋼線の連続処理方法。While running the steel wire, it is subjected to electrolytic pickling, electrical heating annealing, and in the electrolytic pickling process, the sulfate group concentration is 10 to 30% by weight, the ferrous ion concentration is 1 to 100 g / liter, and the bath temperature is 5 to 5%. Under pickling bath conditions of 40 ° C., electrodes are arranged in the order of anode, cathode, anode, cathode, anode, anode from the pickling bath inlet to outlet, and the steel wire is indirectly energized to 20 to 200 A / dm. at a current density of 2 steel wire surface, and electrolytic pickling of steel wires over the 2.5 to 20 seconds, in electrical heating annealing step, by energizing heating the steel wire under a non-oxidizing atmosphere, the outer surface is water-cooled A continuous treatment method of steel wire, wherein the steel wire is cooled by inserting the steel wire through a pipe having an interior in a non-oxidizing atmosphere . パイプ内を走行する鋼線を支持して、鋼線とパイプ内面との接触を防止することを特徴とする請求項に記載の鋼線の連続処理方法。The steel wire continuous processing method according to claim 1 , wherein a steel wire traveling in the pipe is supported to prevent contact between the steel wire and the pipe inner surface. 通電加熱焼鈍後、更に鋼線を走行させつつ電解化成し、潤滑処理することを特徴とする請求項1又は2に記載の鋼線の連続処理方法。 3. The steel wire continuous treatment method according to claim 1, wherein after the electric heating annealing, the steel wire is further electrolyzed and lubricated while being run. 潤滑処理後、更に鋼線を走行させつつ伸線することを特徴とする請求項に記載の鋼線の連続処理方法。4. The steel wire continuous treatment method according to claim 3 , wherein after the lubrication treatment, the steel wire is further drawn while running. 電解化成工程において、亜鉛イオン2〜70g/リットル、リン酸イオン2〜100g/リットル、硝酸イオン3〜100g/リットルを含有し、リン酸イオンに対する亜鉛イオンのモル比が0.5〜1.5の処理液を電解液とし、鋼線を陰極として、1〜100A/dmの鋼線表面での電流密度で、50〜200クーロンの電解を行い、鋼線の表面にリン酸塩被膜を形成することを特徴とする請求項3又は4に記載の鋼線の連続処理方法。In the electrolytic formation step, zinc ion 2 to 70 g / liter, phosphate ion 2 to 100 g / liter, nitrate ion 3 to 100 g / liter is contained, and the molar ratio of zinc ion to phosphate ion is 0.5 to 1.5. The electrolyte solution is used as the electrolytic solution, the steel wire is used as the cathode, electrolysis is performed at 50 to 200 coulombs at a current density of 1 to 100 A / dm 2 on the surface of the steel wire, and a phosphate coating is formed on the surface of the steel wire. The continuous processing method of the steel wire of Claim 3 or 4 characterized by the above-mentioned. 電解化成工程の前工程として、チタン濃度が1〜20mg/リットルのコロイダルチタン又は、亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の溶液であって、チタン又は亜鉛又はカルシウム又はマグネシウム又は鉄のイオン濃度が1〜100mg/リットルの処理液、又は亜鉛、カルシウム、マグネシウム、鉄の何れか一つを含有するリン酸金属塩の微粒子であって粒径が0.05〜5μの微粒子を含有する処理液に鋼線を接触させて鋼線を表面調整することを特徴とする請求項に記載の鋼線の連続処理方法。As pre-process for the electrolytic formation process, colloidal titanium of the titanium concentration 1 to 20 mg / liter or, zinc, calcium, magnesium, a solution of phosphoric acid metal salt containing any one of iron, titanium or zinc, or A treatment liquid having an ion concentration of calcium, magnesium, or iron of 1 to 100 mg / liter, or fine particles of metal phosphate containing any one of zinc, calcium, magnesium, and iron, and having a particle size of 0.05 to 6. The continuous treatment method of a steel wire according to claim 5 , wherein the surface of the steel wire is adjusted by bringing the steel wire into contact with a treatment liquid containing 5 μm fine particles. 潤滑処理工程において、ステアリン酸ナトリウム、ステアリン酸カルシウム、ステアリン酸亜鉛、ステアリン酸鉄の何れか一つ又は二つ以上を主成分とする粉末、又は当該粉末の5〜20重量%水溶液、又は前記粉末の5〜20重量%水分散液を、鋼線に塗布することを特徴とする請求項3乃至6の何れか1項に記載の鋼線の連続処理方法。In the lubricating treatment step, a powder mainly containing any one or more of sodium stearate, calcium stearate, zinc stearate and iron stearate, or a 5 to 20% by weight aqueous solution of the powder, or the powder The continuous treatment method of a steel wire according to any one of claims 3 to 6 , wherein 5 to 20 wt% aqueous dispersion is applied to the steel wire. 鋼線の走行速度が10〜200m/分であることを特徴とする請求項1乃至の何れか1項に記載の鋼線の連続処理方法。The continuous processing method of the steel wire according to any one of claims 1 to 7 , wherein a traveling speed of the steel wire is 10 to 200 m / min.
JP2002363694A 2002-12-16 2002-12-16 Continuous processing method of steel wire Expired - Fee Related JP4145136B2 (en)

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CN110467974A (en) * 2019-08-12 2019-11-19 山东聚力焊接材料有限公司 Solid welding wire surface degreasing derusting mixing cleaning agent, manufacturing method and application method

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JP2007056317A (en) * 2005-08-25 2007-03-08 Rima Kk Low carbon steel wire containing no iron oxide layer
WO2011013445A1 (en) * 2009-07-27 2011-02-03 不二商事 株式会社 Bead wire manufacturing method and manufacturing apparatus
CN102586839B (en) * 2012-03-26 2014-12-10 南通高罕金属设备科技有限公司 Folding type on-line phosphating device for cogging
CN107825264B (en) * 2017-11-17 2024-01-16 杭州新坐标科技股份有限公司 Wire rod treatment process and device after drawing softening annealing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110467974A (en) * 2019-08-12 2019-11-19 山东聚力焊接材料有限公司 Solid welding wire surface degreasing derusting mixing cleaning agent, manufacturing method and application method

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